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A Generation Structure of Continuous Gas Film on the Surface of a Substrate

A substrate and air film technology, applied in the direction of engine components, machines/engines, blade support components, etc., can solve the problems that the surface of the substrate cannot be completely covered, the cooling effect of the air film is limited, and the mechanical strength of the substrate is reduced.

Active Publication Date: 2021-11-30
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a tank can only assist the cooling gas from the cooling hole to adjust the flow direction of the airflow. The initial gas film is still formed mainly by the cooling hole, so the gas film flowing out of the tank still has insufficient uniformity and cannot Problems with complete coverage of the substrate surface
In addition, there is also the problem of limited film cooling effect
In addition, in this structure, in order to form a continuous gas film, it is necessary to set more cooling holes, which will reduce the mechanical strength of the matrix

Method used

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  • A Generation Structure of Continuous Gas Film on the Surface of a Substrate
  • A Generation Structure of Continuous Gas Film on the Surface of a Substrate
  • A Generation Structure of Continuous Gas Film on the Surface of a Substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0037] In this embodiment, the base body is a turbine blade 100 . image 3 is a schematic diagram of the turbine blade, Figure 4 yes image 3 Schematic diagram of the horizontal section of the structure.

[0038] The turbine blade 100 is composed of a split body I and a split body II, wherein the split body I and the split body II are connected at a dividing line 106 to form a complete turbine blade 100 .

[0039] A surface 101 of the turbine blade 100 is provided with a plurality of grooves 105 spaced apart from each other and parallel to each other. The length of the grooves can partly or completely pass through the surface 101 of the turbine blade 100 .

[0040] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of a tank body 105 in FIG.

[0041] from Figure 5 It can be seen from the figure that each tank body includes a tank body bottom 500 and tank body side walls 600, 700; each tank body bottom is provided with a number of discrete holes 400 p...

Embodiment 2

[0049] In this embodiment, the turbine blade with film cooling structure is basically the same as the structure in Embodiment 1, except that the angle θ between the central axis of the discrete hole and the normal direction of the substrate surface 102 is 0 °; the angle α between the axis of the opening end of the groove along the depth direction and the normal line of the substrate surface 101 is 45°; H 1 :H 2 ≥2:1.

[0050] Same as Embodiment 1, after the cooling gas on the surface 102 side of the base body enters the tank body from the discrete holes, the gas from each discrete hole will not only expand and mix along the length direction of the tank body, but also diffuse, mix, and interact with each other along the depth direction of the tank body. Superposition, that is, it can be fully developed in the first part of the tank body, thereby forming a continuous and uniform positive pressure gas, and then transported to the open end to flow out from the side of the substra...

Embodiment 3

[0052] In this embodiment, the turbine blade with film cooling structure is basically the same as that in Embodiment 1, the difference is that H 1 :H 2 ≥3:1, the angle θ between the central axis of the discrete hole and the normal direction of the substrate surface 102 is 10°; the two side walls of the first part 302 are two parallel straight line segments spaced apart, each straight line segment The included angle with the groove bottom is 65°; the included angle α between the axis of the opening end of the groove along the depth direction and the normal line of the base surface 101 is 50°.

[0053] Same as Embodiment 1, after the cooling gas on the surface 102 side of the base body enters the tank body from the discrete holes, the gas from each discrete hole will not only expand and mix along the length direction of the tank body, but also diffuse, mix, and interact with each other along the depth direction of the tank body. Superposition, that is, it can be fully developed...

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Abstract

The invention discloses a generating structure of a continuous gas film on the surface of a substrate. A number of concave grooves are set on one surface of the base body, and a number of discrete holes are set at the bottom of each groove body to penetrate to the other surface of the base body; the groove body is a special-shaped groove, which is composed of at least two parts along the depth direction. for H 1 The part is the first part, the remaining part is the second part, and at least one side wall of the second part is formed by lateral expansion of the same side wall of the first part. After the gas is ejected from the discrete holes, it fully develops in the first part of the tank body to form a continuous and uniform positive pressure gas, and then it is transmitted to the opening end and flows out towards the side of the substrate surface through the second part, forming a continuous and uniform attachment on the substrate surface air film.

Description

technical field [0001] The present application relates to the technical field of substrate surface treatment, in particular to a structure for generating a continuous gas film on the surface of a substrate. Background technique [0002] Forming a gas film on the surface of the substrate has many uses. The formation of a hot gas film can heat the substrate, and the formation of a cooling gas film can cool and protect the substrate. [0003] For example, in technical fields such as industry and aerospace, many substrates work in a high-temperature gas environment and need to withstand thermal stress and thermal corrosion caused by high-temperature flames. For example, the combustion chamber is a device that converts the chemical energy of fuel into heat energy, and is one of the core components of engines and gas turbines. The combustion process of the combustion chamber mainly takes place in the flame tube of the combustion chamber. The wall of the flame tube needs to withst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/18
CPCF01D5/186
Inventor 张文武郭春海王玉峰张天润
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI